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研究结果显示随着连栽代次的增加 ,胸高形率、胸高形数和高径比等指标逐代升高 ,而干材尖削度则逐代下降 ,表明连栽代次增加 ,立木树干圆满度提高 ,有利于干材的出材率。木材的基本密度随树高部位上升而有递减趋势。木材基本密度和纤维长度则随代次增加而逐代递增。 2、3、4代林木材基本密度分别比1代林增加了 7 3%、1 2 4 %和 1 5 8%。与 1代林相比 ,2、3、4代林干材率分别提高了 1 5 5 %,2 0 7%和2 0 3%。总体来看 ,随着连栽代次的增加 ,木材的基本材性有所改善。
The results showed that with the increase of successive planting substitution, the indexes of thoracic height, thoracic shape and height to diameter ratio increased gradually from one generation to the next, while the taper of dry material decreased gradually from one generation to the next, Satisfaction increased, is conducive to the dry material of the timber rate. The basic density of wood increases with the height of the tree has a decreasing trend. The basic wood density and fiber length increase gradually with the generation. The basic density of woods of 2, 3 and 4 generations increased by 73%, 122% and 15% respectively over those of generation 1 forest. Compared with the first generation of forest, the 2,3,4 generations of wood increased by 15.5%, 20.7% and 20.3% respectively. In general, the basic wood properties have been improved with the increase of continuous plantings.